Crank-case ventilator



- w. D. a-mmmom CRANK CASE VENTILATOR Filed Dec. l5. 1926 2 Sheetwhee' l MMM WW www ASM/MUM GRANK CASE VENTILATOR Snom/Mou Patented Dec. 27, 1927.

UNITED STATES JAMES D. SHANNON, OF DINES, WYOMING.

CRANE-CASE VENTILATOR.

Application led December 13, 1926. Serial No. 154,612.

My invention relates to ventilators for the crank cases of internal combustion engines.

The advantages of the crank case ventilation are recognized, and the engines of automobiles are provided with diiferent types of ventilators.

In accordance with my invention, I provide a crank case Ventilating means whereby fresh air is drawn into the crank case, through the breather opening, upon one side of the engine, and withdrawn from the crank case from the opposite side of the engine. The device is connected up with the lintake side of the carburetor, and the desired suction is obtained from the carburetor.- The Ventilating means maintains the oil suitably cool, reventing overheating of the same where y thc oil maintains its proper thickness or body and the. hot air, smoke or gases,

`ordinarily present in the crank case, are

withdrawn from the same. The oil thus treated in the crank case will possess the proper lubricating properties and the compression of the engine will be increased, with the resultant increase in speed and power, in the operation of the engine. In the embodiment of my invention, the heated gases are withdrawn from the crank case and pass into and through separator or separators, located in the tappet chambers. The excess oil is separatedfrom the gases and collected in the separators and returned to the crank case, while the heated gases pass to the intake of the carburetor, and aid in the proper vaporization `of the incoming gasoline mixture.

i In the accompanying drawings, forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a sid-e elevation of apparatus embodying my invention, showing the same applied to an internal combustion engine of the poppet valve type,

Figure 2 is an enlarged side elevation of one of the tappet chamber plates, with the separator arranged behind the same,

Figure 3 is a transverse section through the tappet chamber, showing the separator arranged therein,

Figure 4 is a perspective view of the separator,

Figure 5 is anelevation of the inner side oi the separator,

Figure 6 is a transverse section taken on line 6--6 of Figure 5,

Figure 7 is a longitudinalv section taken on line 7-7 of Figure 6, and,

Figure 8 is a similar view taken on line 8 8 of Figure 6. i

I'n the drawings, wherein for the purpose of illustration, is shown a preferred embodiment of my invention, the numeral l() desig-1 nates the cylinder block of an internal combust1on engine of the poppet valve type. The poppet valves are actuated by tappet rods 11, arranged in tappet chambers 12, Figure 3. The tappet chambers are in communication with the crank case 13 of the engine, upon one side of the engine, through openings 14 at the bottom of the tappet chambers. A breather opening, such as the usual opening through which the oil is fed into the crank case, is arranged upon the opposite side of the crank case 13. The tappet chambers 12 are covered by lates 15, which are removtilile, and held 1n place by bolts 16 or the In accordance with my invention, I arrange a separator 17 in each tappet' chamber 12, and this separator is disposed outwardly of the tappet rods 11, so as not to interfere with the ope-ration of the same. The separator embodies an outer shell carrying upon its outer side a tubular coupling 18, extending through an opening 19 formed in the tappet chamber plate 15. The tubular couplings 18 extend to the exterior of the plates 15. Suitably connected Iwith the tubular coupling 18, to the right, is a pipe 20, the opposite end of which is suitably connected with the tubular coupling 18, to the left. The pipe 20 is arranged exteriorly to the plates 15 and preferably behind the intake manifold 21, which leads to the outlet side of the carburetor 22, having an intake pipe 23, passing to its intake side. Gonnected with the pipe 20 by means of a T- coupling 24, or the like, is a pipe 25, connected with the pipe 23 by means of a T- coupling 26.

The separators 17 are identical, and each embodies an outer casing 27', having an outer fiatside 28 and a bottom 29, curved in cross section, as clearly shown in Figure 6. The bottom 29 'is continued upwardly upon the inner side oi the 'shell to provide a side 30, the edge oi which is preferably curved, as shown at 31. The tubular coupling 18 passes through the outer side 20, adjacent to its center. The ends of 'the casing are ciosed by end walls or heads 32, as shown. Aarranged liti ` other side of the engine.

` outwardly longitu within the casing 27 adjacent to the tubular coupling 18 is a longitudinal vertical baie 33, forming a gas-tight joint with thetop 34 of the casing and the end walls 32. This baile is spaced from the bottom 29, as shown. The baiile is provided at its top and at its ends with inletopenings 35, eut therein, as shown. The numeral 36 designates an intermediate longitudinal vertical bathe, the ends of which form a gas-tight joint with the end walls 32 and the upper end of which forms a gas-tight joint with the top 34. The lower end of this intermediate baiile is spaced from the bottom 29. The intermediate baiile is provided centrally thereof with a V-shaped opening 37, decreasing vin width downwardly, as shown. The numeral 38 designates an outer baille vertically arranged and extending longitudinally of the casing. This outer baille has a gas-tight joint vwith the end walls 32 and with the top 34. The baffle 38 is spaced at its lower end from the bottom' 29. The end walls 19 are provided at their upper ends with air inlet openings 39. These openings lead tothe space between the baiiies 36 and 38 and have no direct communication with the space between the bales 33 and 36. The openings39 are preferably covered by guards 40. lIt might be stated at this point that heated gases or air laden with the particles of oil pass into and through the separatoriand b contact with the several vertical bailles, t e larger particles of the oil are separated from the gases and pass downwardl upon the bales and are collected in the ottom 29 of the casing. This provides an elevation of oil, indicated at 41 and the baies extend between this elevation of oil whereby a trap or seal is provided, preventing the gases from passing around the bottom ends of the baiiles. The level of the oil is maintained by the collected oil overflowing the edge 31 whereby itpasses.

to the bottom of the tappet chamber 12 and hence returns to the crank case.

The operation of the apparatus is as follows: Y During the operation of the engine, the suction in the carburetor intake pipe 23 is transmitted to the pipe 25 and from this pipe through the pipe 20, to the.' interior of the separators 17. The resh air enters the cranlrcase of the 'engine upon one side, through the breather opening and passes across the crank case and becomes laden with the heated gases or vapors arising from the oil and then passes upwardly, through `the openings 14 in the tappe't chambers on the The heated gases laden with the particles of oil now enter the separators through the openings 39 and travel inwardly longitudinally to the bale 33 until the centralopenn'gulT is reached and then ally of the s ace between the hales 36 'and 33, until e openings 35 are reached, and then inwardly longitudinally to the bailles 33 until the coupling 18 is reached. During this travel of the gases the particles of oil contacting with the bailles are separated out from the gases and are collected in the bottom of the separator, and subsequently returned to the crank case, as above explained. The heated gases passing through the couplings 18 are fed to the intake pipe of the carburetor, and aid in the proper vaporization ofthe incoming charge of gasoline traveling to the carburetor.

It is to be understood that the form of my invention, herewith shown and described,

is to be taken as a preferred example of the.

same, and that various changes in the shape', size and arrangements of parts may be resorted to without departing from the spirit oit my invention or the scope of the subjoined claims.

Having thus described my invention. l elaimz- 1. A device for separating particles of oil Jfrom heated gases, comprising a relatively thin shell adapted to be mounted in the tappet chamber of an internal combustion engine, said shell having one side closed and its opposite side open and a bottom extending adjacent to the open side, the upper edge of the bottom constituting an overflow level for the shell at the open side, a plurality of spaced baliles arranged within the shell and extending longitudinally thereof and having their lower ends spaced from said bottoni, said bottom holding the collected oil and the bales extending into the oil below the level thereof for producing a seal, inlet means leading into the shell adjacent the open side thereof and between the bales, and an outlet leading into the shell adjacent to the closed side.

2. A device for separating particles of oil from heated gases, comprising a shell adapt- `ed to be arranged within the tappet chamber of the internal combustion engine, said shell having one side closed and its opposite side open and a bottom extending adjacent to the open side for forming an overflow wall, three baffle plates extending longitudinally within the shell and laterally spaced from each other, the intermediate baille plate being provided with a central opening formed therein, the-baille plateadjacent the closed side of the shell being provided with openings at its ends, inlet openings formed in the ends of said shell and leading into the same between the intermediate baille and the bale adjacent to the open vside of the shell and au outlet connected with the closed side of the shell and leading into the shell upon the outer sid(` of the baille arranged adjacent to such closed side and between the openings at the end.`l of such baie.

In testimony whereof I aix my signature JAMES D. SHANNON.

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